0.1,1循环+0.2,2循环+0.3,3循环+......+0.87,87循环+0.88,88循环+0.89,89循环

问题描述:

0.1,1循环+0.2,2循环+0.3,3循环+......+0.87,87循环+0.88,88循环+0.89,89循环

是44.45,45循环呵呵
原式=(0.1,1循环+0.89,89循环)+(0.2,2循环+0.88,88循环)+...+(0.44,循环+0.46,循环)+0.45,45循环
=44.45,45